TY - JOUR AU - V. Z. Ènol'skii TI - Topological properties of Landau curves in connection with Mandelstam's conjecture JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1975 SP - 335 EP - 347 VL - 23 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1975_23_3_a5/ LA - ru ID - TMF_1975_23_3_a5 ER -